All categories

3 years ago

Please help me with these 2 questions!

Mathematics

1 answer:

Virty [35]3 years ago

5 0

Answer:

Step-by-step explanation:

Nor w

You might be interested in

What is the solution to y = x + 2 and y = 3x – 2 and how do you know? PLEASE HELPPPPP! THANK U!

Nutka1998 [239]

Answer:

(2,4)

Step-by-step explanation:

We have the system:

y=x+2

y=3x-2.

This is already setup for substitution.

I'm going to replace my first y with what the second y equals.

That is, I'm going to write 3x-2=x+2.

Time to solve the following for x:

3x-2=x+2

Subtract x on both sides:

2x-2= 2

Add 2 on both sides:

2x. = 4

Divide both sides by 2:

x. = 2

Now that we know x=2 and we have an equation that relates x to y: either y=x+2 or y=3x-2, doesn't matter which we use, we can find y.

So we y=x+2 with x=2 which means y=2+2=4.

So the solution, the intersection, is (2,4).

5 0

3 years ago

Read 2 more answers

Please help meeeeeeeeee

Yuliya22 [10]

Answer:

FRACTION DECIMAL PERCENT

3/100 0.03 3%

3/2 1.5 150%

13/20 0.65 65%

2/3 0.6667 66.67%

4 0

3 years ago

If y = 3x^3 - 2x and dx/dt equals 3, find dy/dt when x = -2. Give only the numerical answer. For example, if dy, dt = 4, type on

Nadya [2.5K]

Answer:

$\frac{dy}{dt} = 102$

Step-by-step explanation:

step(i)

Given function y = 3 x³ - 2 x ... (i)

Differentiating equation (i) with respective to 'x'

$\frac{dy}{dx} = 3 (3 x^{2} ) - 2(1)$

Given x = -2

$(\frac{dy}{dx} ) x_{=-2} = 3 (3 (-2)^{2} ) - 2(1)$

$(\frac{dy}{dx} ) x_{=-2} = 36 -2 =34$

Step(ii):-

we know that

$\frac{dy}{dx} = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

Given $\frac{dx}{dt} = 3 and \frac{dy}{dx} = 34$

$\frac{dy}{dx} = \frac{\frac{dy}{dt} }{\frac{dx}{dt} }$

substitute values $\frac{dx}{dt} = 3 and \frac{dy}{dx} = 34$

⇒ $34 = \frac{\frac{dy}{dt} }{3 }$

cross multiplication , we get

$\frac{dy}{dt} = 34( 3 ) = 102$

Final answer:-

$\frac{dy}{dt} = 34( 3 ) = 102$

8 0

3 years ago

40 points a bird drops a stick to the ground from a height of 80ft. the function h = 16t^2 +80 gives the stick approximate heigh

Ira Lisetskai [31]

√ 80/16=t t=0.5590169943749474

4 0

3 years ago

The fourth term of a sequence is 14. Each term of the sequence is 8 less than the previous term. Which recursive formula represe

Zina [86]

an=an+b

14=4a+b and a=-8

14=-32+b

b= 46

an=-8n+46

4 0

3 years ago

Read 2 more answers

Please help me with these 2 questions! ​

Please help me with these 2 questions!